Cheat codes

K - Kill the enemy on the screenR - Resurrect you where you last died+ - Increase time left- (minus) - Decrease time left[Shift]+L - Warp you to next level[Shift]+T - Give you an extra life[Shift]+S - Heal a lost life[Shift]+W - Allow you to float down long drops[Shift]+B - Block out non-animated objects[Shift]+I - Invert the screenN - Look at screen below the current oneU - Look at screen above the current oneH - Look at screen to the left of current oneJ - Look at screen to the right of current oneC - Show coordinates[Shift]+C - Show more coordinates

About the coordinates [Shift-C] and [C]

Start the game with cheats-mode on (megahit or improved). You will get for Prince of Persia 1 - Level 1 - First screen:

For "C": S1 L5 R0 A0 B2
For "Shift-C": AL0 AR0 BL6 BR3

Sx : the Prince is in room x
Ly : If you leave Sx on the left you will enter room y
R : Right
A : Above
B :Below

AL: Above left
AR: Above right
BL: Below left
BR: Below right

A bit more precisely, AR is the room to the right from the room above
the current room. That may be different from the one above the one to
the right of the current. It's similarly for the others. You should know this after making that many irregular links. ;)

All of these 8 rooms contain some information about the room x.
If you are in room x, you can see some parts of AL and BL.
You see tile 30 of AL, and tile 10 of BL. And, you see the room at the left (tiles 10, 20 & 30).